|
|
Odeon Twister (v1.4) |
???? |
Open |
|
|
Odeon Twister 2 (v202.19) |
???? |
Open |
|
|
Oedo Fight (Japan, Bloodless version) |
???? |
Open |
|
|
Oedo Fight (Japan, Bloodshed version) |
???? |
Open |
|
|
Off Road Challenge (v1.00) |
???? |
Open |
|
|
Off Road Challenge (v1.10) |
???? |
Open |
|
|
Off Road Challenge (v1.30) |
???? |
Open |
|
|
Off Road Challenge (v1.40) |
???? |
Open |
|
|
Off Road Challenge (v1.50) |
???? |
Open |
|
|
Off Road Challenge (v1.63) |
???? |
Open |
|
|
Off the Wall (2-player cocktail) |
???? |
Open |
|
|
Off the Wall (Sente) (10/16/84) |
???? |
Open |
|
|
Offensive (Spanish bootleg of Scramble) |
???? |
Open |
|
|
Office Yeo In Cheon Ha (version 1.2) |
???? |
Open |
|
|
Oh My God! (Japan) |
???? |
Open |
|
|
Oh! Bakyuuun (Japan, OB1/VER.A) |
???? |
Open |
|
|
Oh! Paipee (Japan 890227) |
???? |
Open |
|
|
Ojanko Club (Japan, Program Ver. 1.2) |
???? |
Open |
|
|
Ojanko Club (Japan, Program Ver. 1.3, set 1) |
???? |
Open |
|
|
Ojanko Club (Japan, Program Ver. 1.3, set 2) |
???? |
Open |
|
|
Ojanko High School (Japan) |
???? |
Open |
|
|
Ojanko Yakata (Japan) |
???? |
Open |
|
|
Ojanko Yakata 2bankan (Japan) |
???? |
Open |
|
|
Ojousan (Japan 871204) |
???? |
Open |
|
|
Ojousan [BET] (Japan 870108) |
???? |
Open |
|
|
Oli-Boo-Chu (USA) |
1981 |
Open |
|
|
Olimpic Hockey (EM Bubble Hockey, set 1) |
???? |
Open |
|
|
Olimpic Hockey (EM Bubble Hockey, set 2) |
???? |
Open |
|
|
Olivmandingo (Spanish bootleg of Mandinga on Galaxian hardware, set 1) |
???? |
Open |
|
|
Olivmandingo (Spanish bootleg of Mandinga on Galaxian hardware, set 2) |
???? |
Open |
|
|
Ollie King (GDX-0007) |
???? |
Open |
|
|
Omega |
???? |
Open |
|
|
Omega (bootleg?) |
???? |
Open |
|
|
Omega (earlier) |
???? |
Open |
|
|
Omega Fighter |
???? |
Open |
|
|
Omega Fighter Special |
???? |
Open |
|
|
Omega Race (set 1) |
???? |
Open |
|
|
Omega Race (set 2) |
???? |
Open |
|
|
Omega Race (set 3, 7/27) |
???? |
Open |
|
|
Omni |
???? |
Open |
|
|
Omotesandou (Japan 890215) |
???? |
Open |
|
|
One + Two |
???? |
Open |
|
|
One + Two (earlier) |
???? |
Open |
|
|
One Shot One Kill |
???? |
Open |
|
|
Oni - The Ninja Master (Japan) |
???? |
Open |
|
|
Onna Sanshirou - Typhoon Gal |
1985 |
Open |
|
|
Onna Sanshirou - Typhoon Gal (bootleg) |
???? |
Open |
|
|
OOPArts (prototype, joystick hack) |
???? |
Open |
|
|
Oozumou - The Grand Sumo (DECO Cassette) (Japan) |
???? |
Open |
|
|
Opa Opa (MC-8123, 317-0042) |
???? |
Open |
|
|
Opa Opa (Rev A, unprotected) |
???? |
Open |
|
|
Open Mahjong [BET] (Japan) |
???? |
Open |
|
Linked with game |
Operation Bear (bootleg of Operation Wolf) |
1988 |
Open |
|
|
Operation Thunder Hurricane (ver EAA) |
???? |
Open |
|
|
Operation Thunder Hurricane (ver UAA) |
???? |
Open |
|
Linked with game |
Operation Thunderbolt (Japan) |
1988 |
Open |
|
Linked with game |
Operation Thunderbolt (Japan, SC) |
1988 |
Open |
|
Linked with game |
Operation Thunderbolt (US) |
1988 |
Open |
|
Linked with game |
Operation Thunderbolt (US, rev 1) |
1988 |
Open |
|
Linked with game |
Operation Thunderbolt (World) |
1988 |
Open |
|
Linked with game |
Operation Thunderbolt (World, rev 1) |
1988 |
Open |
|
|
Operation Tiger (Ver 2.14 O) |
1998 |
Open |
|
Linked with game |
Operation Wolf (Japan) |
1987 |
Open |
|
Linked with game |
Operation Wolf (Japan, prototype) |
1987 |
Open |
|
Linked with game |
Operation Wolf (Japan, SC) |
1987 |
Open |
|
Linked with game |
Operation Wolf (US) |
1987 |
Open |
|
Linked with game |
Operation Wolf (World, set 1) |
1987 |
Open |
|
Linked with game |
Operation Wolf (World, set 2) |
1987 |
Open |
|
|
Operation Wolf 3 (Japan) |
???? |
Open |
|
|
Operation Wolf 3 (US) |
???? |
Open |
|
|
Operation Wolf 3 (World) |
???? |
Open |
|
|
Orange Club - Maru-hi Ippatsu Kaihou [BET] (Japan 880221) |
???? |
Open |
|
|
Orange Club - Maruhi Kagai Jugyou (Japan 880213) |
???? |
Open |
|
|
Orbit |
???? |
Open |
|
|
Orbite (prototype) |
???? |
Open |